cable pothead是什么意思？

cable pothead[英][ˈkeibl ˈpɔtˌhed][美][ˈkebəl ˈpɑtˌhɛd]电缆端套; 双语例句 abrupt insulation changes cause very large concentrated electrical stresses.these stresses can be eliminated by terminating the cable above ground in an expensive device known as a “ pothead ”.绝缘层的突变（指电缆端部）引起非常大的集中的电应力（电场强度），这可通过电缆穿出地面时采用昂贵的称为“电缆头”的端部来消除。